It should also be borne in mind that using even the highest quality synthetic oil does not give advantages in terms of prolonging his replacement in excess of the recommended by the vehicle manufacturer. It ensures the engine performance in extreme conditions favorable for extend its resources during normal operation. In addition, the manufacturer of the car, encouraging the use of an oil of API or ACEA, on a minimum acceptable requirements for this class. And oil ekstraklassa that exceed these requirements, may partly compensate for the effects of unfavorable factors, which can not replace him through half of this interval, as, for example, in 2 / 3. In addition, Some promotional materials or that oil is advertised on a large range of shift to shift, for example 30 000 km. It should be understood that this interval is valid not for all cars in general, but only for those who have regulations and permits for such an interval, such as new model BMW or Peugeot (and then only with many reservations).
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